Custom Wordpress plugin wanted for community site

We need a plugin meant for a Wordpress website, for children and parents signing up to activities. Note that you are free to incorporate and make use of any third-party WP plugins which you find useful. If you know your way around the Wordpress plugin directory, it's going to make your work load much easier. The website doesn't need to have any graphical elements, we will take care of that. We simply need the functionality. Description: On the front end: Parents will be presented with a simple form on a page where they can add their child to a municipality -> school -> group. When the parents have added their child to a group on a certain school they will receive an email with a “Info about child” link as well as payment information - everything in the email is static except for the “Info about child” link. The “Info about child” link will be a basic php page that lies within the WP root directory. It should be accessed like this: [login to view URL] parentsEmailAddress= On the “Info about child” page the parents will be able to see their child's attendance on the lectures. Teachers are added by the admin and should be able to login to their own account on the wp-admin. The admin then assigns each teacher to diferent groups (sometimes one teacher can have multiple groups). The teachers can, when logged in see a list of all the children that are registered to a certain group. They can get the parents email info, childs name, etc (the form data added from the parents). After each lecture the teachers logs in to their wpadmin and are able to add attendance for each child. The admin can see a list of all teachers and children, the admin also has a checkbox for each child within each group named “childHasPaid” which is a way for the admin to manually keep track which parent has paid. Functionality Breakdown: Front-end: - Parents can ?ll in a form with child’s name, their email, etc. - After the parent has added a child they will receive an email with the unique “Info about child” link - The “Info about child” link takes the parents to a page where they can see their child’s attendance on the lectures. NOTE: If a parent has more than one child, their email will bring up both of the children on the “Info about child” page. Teachers: - Can login to wp-admin and add attendance for the children in their groups - Teachers can only see the groups that they have been added [login to view URL] - Create / remove teacher - Add / remove teacher to/from groups - Create / remove municipality - Create / remove schools - Create / remove groups - Manually add children and assign them to a municipality -> school -> group - See a list of all children within a selected municipality -> school -> group and be able to check a checkbox “cildHasPaid”. - Be able to see attendance sheet for a certain group